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/*
* Copyright (C) 2013-2021 Apple, Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include "WeakMapConstructor.h"
#include "IteratorOperations.h"
#include "JSCInlines.h"
#include "JSWeakMapInlines.h"
#include "WeakMapPrototype.h"
namespace JSC {
const ClassInfo WeakMapConstructor::s_info = { "Function"_s, &Base::s_info, nullptr, nullptr, CREATE_METHOD_TABLE(WeakMapConstructor) };
void WeakMapConstructor::finishCreation(VM& vm, WeakMapPrototype* prototype)
{
Base::finishCreation(vm, 0, "WeakMap"_s, PropertyAdditionMode::WithoutStructureTransition);
putDirectWithoutTransition(vm, vm.propertyNames->prototype, prototype, PropertyAttribute::DontEnum | PropertyAttribute::DontDelete | PropertyAttribute::ReadOnly);
}
static JSC_DECLARE_HOST_FUNCTION(callWeakMap);
static JSC_DECLARE_HOST_FUNCTION(constructWeakMap);
WeakMapConstructor::WeakMapConstructor(VM& vm, Structure* structure)
: Base(vm, structure, callWeakMap, constructWeakMap)
{
}
JSC_DEFINE_HOST_FUNCTION(callWeakMap, (JSGlobalObject* globalObject, CallFrame*))
{
VM& vm = globalObject->vm();
auto scope = DECLARE_THROW_SCOPE(vm);
return JSValue::encode(throwConstructorCannotBeCalledAsFunctionTypeError(globalObject, scope, "WeakMap"_s));
}
JSC_DEFINE_HOST_FUNCTION(constructWeakMap, (JSGlobalObject* globalObject, CallFrame* callFrame))
{
VM& vm = globalObject->vm();
auto scope = DECLARE_THROW_SCOPE(vm);
JSObject* newTarget = asObject(callFrame->newTarget());
Structure* weakMapStructure = JSC_GET_DERIVED_STRUCTURE(vm, weakMapStructure, newTarget, callFrame->jsCallee());
RETURN_IF_EXCEPTION(scope, { });
JSWeakMap* weakMap = JSWeakMap::create(vm, weakMapStructure);
JSValue iterable = callFrame->argument(0);
if (iterable.isUndefinedOrNull())
return JSValue::encode(weakMap);
JSValue adderFunction = weakMap->JSObject::get(globalObject, vm.propertyNames->set);
RETURN_IF_EXCEPTION(scope, encodedJSValue());
auto adderFunctionCallData = JSC::getCallData(adderFunction);
if (adderFunctionCallData.type == CallData::Type::None)
return throwVMTypeError(globalObject, scope, "'set' property of a WeakMap should be callable."_s);
bool canPerformFastSet = adderFunctionCallData.type == CallData::Type::Native && adderFunctionCallData.native.function == protoFuncWeakMapSet;
scope.release();
forEachInIterable(globalObject, iterable, [&](VM& vm, JSGlobalObject* globalObject, JSValue nextItem) {
auto scope = DECLARE_THROW_SCOPE(vm);
if (!nextItem.isObject()) {
throwTypeError(globalObject, scope, "WeakMap requires that an entry be an Object."_s);
return;
}
JSObject* nextObject = asObject(nextItem);
JSValue key = nextObject->getIndex(globalObject, static_cast<unsigned>(0));
RETURN_IF_EXCEPTION(scope, void());
JSValue value = nextObject->getIndex(globalObject, static_cast<unsigned>(1));
RETURN_IF_EXCEPTION(scope, void());
if (canPerformFastSet) {
if (UNLIKELY(!canBeHeldWeakly(key))) {
throwTypeError(asObject(adderFunction)->globalObject(), scope, WeakMapInvalidKeyError);
return;
}
weakMap->set(vm, key.asCell(), value);
return;
}
MarkedArgumentBuffer arguments;
arguments.append(key);
arguments.append(value);
ASSERT(!arguments.hasOverflowed());
scope.release();
call(globalObject, adderFunction, adderFunctionCallData, weakMap, arguments);
});
return JSValue::encode(weakMap);
}
}
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